First of all, Democracy didn't originate in Rome but in ancient Greece - please don't call people names when your own information is less than perfect.
Secondly,
The Prophet did not just immediately declare Islamic Democracy - he spent decades preaching Islam, laying the foundation and preparing society for the revolutions he was about to bring. God himself commanded the use gradual change in that situation, for example alcohol was gradually prohibited in a step by step manner, because it wouldn't be practical to just immediately change the law about it.
There's a similar principle behind Democracy too - just as people needed to be educated about Islam (they still need to), the reasoning behind it and its application, people need to be educated about Democracy.
Only this time, we don't have a Prophet to do it - we will have to find the right leaders eventually, through a trial-and-error process which we are currently experiencing. But there's no point if trial and error results in our country being dissolved, which is why we need stability.
The time under the Prophet (s.a.w), was different in too many ways- you can not realistically expect any of that to happen in Pakistan's current situation. It is good to think or dream about but in reality,
@That Guy is right in a sense that Democracy will take time to actually reach a position in which it is fair, the loopholes and vulnerabilities have been reduced and it is a viable system of governance - and that too after a society is made ready for it, which takes time and education.
So unless you know someone who has a direct pipeline to God and can perform miracles and summon Angels for help, please don't suggest such impractical actions.
Anyway, there is no doubt about Islam's democratic qualities but I would prefer if it is kept away from Pakistani politics and politics in general -
we should apply the Prophet's principles in all situations, including politics,
but we should never try to assume his role.